Form for concrete structures



Sept. 25, 1923.. M4535@ H. E. DUNN FORM FOR CONCRETE STRUCTURES Filed May 29. 1922 2 @bww-sheet l ZZ El Slept. z5,l 1923'.

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Patented Sept. 25, 1923.

,aire sra lenteur maar e i :Le

nenn-Y n nUNN, or HOLLAND, MICHIGAN, .ssreNoa fro w. nIINN MANUFACTUR- ING COMPANY, or HOLLAND, MICHIGAN, A CCRPCRATI'ON or MICHIGAN.

FORM ron CONCRETE STRUCTURES.

Application led May 29, 1922.. Serial No'. 564,534.

T all whom t may concern Be it known that I, HARRY E. DUNN, a citizen of the Dominion of Canada, residing at Holland, in the county of Ottawa and State of Michigan, have invented a new and useful Improvement in a Form 'for ConcreteV Structures, of which the following is a specification.

My present invention relates to a form or l0 mold for the making'of concrete structures, 'such as tile, building blocks, and the like.

Among the divers objects of my invention are the provision of a form or mold that may be readily used in conjunction with a l5 machine for automatically fabricating the tile, building` block, etc.,A having a bore or central openine', preferably longitudinally therethrough. In this connection, I have provided a form or mold that is vreadily separable for the convenient removal of the completed structure after the same has been removed vfrom the machine or apparatus. I have also constructed this device in a j manner so that provision is made for the I" fabrication ot two half-length tiles, blocks, etc., in a single form, and have also provided means whereby a tile, block, etc., for use at the corner of a building, or similar struc-ture maybe conveniently made without removingthe article from the form until it has been set sufficiently to avoid its becoming distorted after removal.

In the fabrication of tile, building blocks, j etc.. ot rectangular cross-section, it is obvious that the laces should be parallel upon opposite sides and adjacent faces should, be precisely at true right angles to each other; vin other words the reentrant angle formed j by the meeting of one face with each adjoining face should be exactly ninety-degrees- However, it `frequently occurs in assembling the several parts of a form or mold that the adjoining walls vary slightly from the j ninety degree angle, and I have therefore devised a novel structure wherein this inadvertence or detect may be quickly oven come'in a simple and elfeetive manner. I have also provided a unique latching device j in connection with the separable or hinged form or mold which will insure the walls `of the mold being firmly clamped in relation to each other, and which may be readily yadjusted for the purpose of taking up wear or playtbetween the parts.

I prefer to carry out my invention in substantially the manner hereinafter fully described, and as more particularly pointed out in the claims, reference being made to the accompanying drawings that are, in a sense, merely schematic for the purpose of illustration, and disclose a typical or preferred embodiment of my invention.

In the drawings:

Fig. l is a vertical side elevation of my invention, and

2 is a similar view of a tace or wall thereof at a right angle to' Fig. l.

F ig. 3 is a transverse horizontal section of the structure taken on the line 3-3, Fig. l. 70

Fig. L is a top plan of my invention with the latch released and the hinged walls slightly opened.

Fig. is a vertical side elevation of my form showingthe use oit' asupplementary 75 plate I'or making a rock face.

Fig. 6 is a transverse section thereof on line (3 6, Fig. 5.

Fig. T is a transverse section on line 7-7, Fig. i), showing the manner of using aremovable wall for provi-ding a tapestry, tint* ed, or other facing upon the linished block or tile.

Fig. 8 is a perspective of a shelf for use in forming shorter end-blocks in order to break joints in walls.

In the drawings, for the purpose of convenience, similar reference characters have been employed to designate the same parts throughout the several views, and by referring, first, to"Figs. 3 and il, it will be seen the structure preferably comprises two elongated rectangular shaped walls A and B that are permanently and integrally jointed to each other along their meeting longitudinal edges so as to be disposed in planes at right angles to each other in transverse section. Adjacent the longitudinal edges, opposite the joined edges, walls A and B are, respectively, provided with parallel pairs of ears 5 and 6. The movable walls C and D are hingedly connected to walls A and B by upper and lower hinge brackets and 8 extending from the respective walls, brackets 7 of wall C being positioned at their lateral ends between ears 6 and pivotally assembled therewith by pins 9 while the lateral ends ot brackets 8. are similarly positioned between ears 5 and pivotally assembled therewith by pins l0. As will be seenqllO manner.

ears 5, and similar embossments Z) are made at corresponding locations upon wall B, and I prefer to position said einbossments a, and b at the adjacent edges of the respective walls so as to be spaced from the pins/9 and 10.V l/Vhen walls C and D have been closed and locked the edges of hinge brackf ets 7 and 8 will contactl the adjacent portions Aoftherespec-tive embossments b and a, and

should the walls be found to be distorted from a Vtrue right angle the embossinents may be eitherbuilt up or reduced in thickness to permit of a trueing of the walls, as willY be understood.

Extending laterally outwardly from wall C is a pair of spaced ears 11 that are transversely Vbored to receive a vertically disposed rod 12 upon which a latch member is hing e'dly mounted. This latch member coinprises a substantially U-shaped casting, the connecting portion 13 thereof being milled out to reduce its weight and is bored longitudinally to receive rod 12, and is positioned between ears 11, as seen in Fig. 2 of tlc drawings. The horizontally' disposed lateral and parallel arms 14 of the U-shaped latch member have hook-shaped recesses or notches 15 in their inner edges to engage their respective latching elements, and the upper arm is slightly longer than the lower ariii to provide a hand-grasp 1G by which the stiucture is operated in the well-knowii Suitable sulistaiitially L-shaped lugs 17 extend transversely and horizontally out from the outer vertical edge of wall D adjacent latch arms 14, and upon the outer portions' of the lateral members of these lugs are provided vertically aliiiing pins 1S that extend towards each other from facing .surfaces ol said lugs and have mounted thereon eccentrically bored sleeves 19 that are adjustably secured thereon by suitable Vnuts 2O screwed upon the threaded extended ends of said pins 18. These sleeves are engaged by notches 15V of the latching member carried by wall C, and in the event of wei or play occurring between these latcliing elements nut-s 20 may be loosened and the eccentric sleeves rotated slightly upon the pins, and the nuts again tightened so that a tighten grip will be had between the latching members.

Whenever it is desired to make half blocks,a suitable partition plate 21 is placedand positioned and supported between oppositely arranged pairs of screws 22 tapped through opposite wallsof'the form, which screws when lthe structure is used for full length tile or blocks, are unsorewed slightly until their inner ends flush with the inl ner surfaces of their respective walls., i

central circular opening 23 is made in said' forming the central bore` therein. When partition plate 21 is used in connection with theV form, the packer-head ,will pass up through central opening 23 therein andform the two half blocks or tiles. Y 1n order to fabricate a block or tile that may be used at the corner of a building structure where it would be undesirable'to have the endof the bore of the tile exposed, 1 prefer Vto place the vform and the packed cement, etc., upon a table E24 from which arises a standard or column 25 of shorter height than the height of the form and block, and 1 prefer that the standard of column 25 be of less diameter than the bore of the block and partition plate 21, as seen in Fig. 3 of the drawings. This will permit me to insert or position the block received from the automatic machine over column 25 and lill in the upper portion of the bore of the block with cement te close the end of said bore. A facing plate 26 having a flange or downturned lip 2T along one edge to facilitate the positioning thereof is placed upon the top of the form, as in Figs. 1 and 2, and struck with a mallet, or the like, while held in position by the operator grasping the ext-ended handle 28 of said plate.

rlhe form and block Y may shortly thereafter be vremoved from the as the structuremay obviously be modiliedVV without departing from the principles setV forth in the appended claims.

lllhen, however, it is desired to give the block an imitation rock or stone faceV a matrix plate D', having the desired irregular depressions upon its inner surface, is sel cured to `wall D by screws 29, as shown in Fig. or in any'other suitable manner, and Wall D is reduced, as at D2, to clear the usual Wearing ring in which the form is mounted on theV table or'platform of theA automatic machine hereinbefore mentioned. In order to accommodate matrix plate D the lateral members of hinge brackctsS are elongated slightly, as at 8a (Fig. (i), as are the corresponding members 17l of thc L- shaped latch lugs 17 which provide shoulders 17 on the latter which abut or contact the adjacent edge of Wall C when the form is closed and locked, similar to the operation ofthe device illustrated in Fig. 3.

`Other styles of facing, such as tapestry., tinted stuccol etc., may be made upon the block by the use of a removable sheet-metal Wall 30 temporarily supported Within the form by means of bifurcatcd lugs or embossments 3l extended inwardly upon facing portions of the oppositewalls .B and D, and adjacent the o uter vertical edges thereof. rihese lugs or embossmentg 3l are in vertical alinement with each other at the top and bottom edges of the respective Walls B and D so that,` the sheet metal Wall 30 may be removed vertically from the form after the facing material has been deposited between it and Wall `C (with Which it is parallel) and the remaining portion of the form has been filled with the material for forming the block.

In `liiying'blocks in tiers it is desirable to break joint in the Well-known manner, and for the purpose of providing a block for the corner which will be the proper size for this purpose I employ a temporary shelf, such as illustrated in detail in Fig. 8., Which, as seen, is of substantially U-shape, the shelf portion 32 being rectangular in outline and having a central opening 33 through which the packer-head of the automatic machine above mentioned is adapted to pass. yThe parallel arms of the U-shaped casting provide standards or supports 34 that elevate shelf 32 the desired distance above the platform or table of the machine, and said standards are spaced a distance less than the Width of the shelf so that the latter overhangs or projects beyond the same to insure the proper disposition of Walls A and B, C and D of the form When the latter is telescoped over the shelf structure. Slotted lateral or-horizontal flanges 35 act as feet at the bottoms of standards 34 and permit of the securing of the device to the platform of the automatic machine by bolts and nuts, or cap-screws the shanks of which enter the slots in said flange.

From the foregoing it will be seen I have provided a structure that may be effectively employedin the fabrication of blocks or tiles of divers lengths and having a variety of finishes upon the surfaces to be exposed to view, and I have also provided a form that may be readily trued to insure accurate angles at the corners of the finished product and which may be effectively and quickly locked or unlocked Whenever it is desired. TvVhile I have herein disclosed the preferred manner of carrying out my invention it is obvious that changes may be made to accommodate the device to other structures, and I therefore desire it understood that all such modifications are fully contemplated as comn ing Within the scope of the appended claims.

Vhat I claim is:

l. A form for concrete and like structures comprising a plurality of Walls hingedly connected together, a hook-shaped latch member pivotally carried by one of said Walls, and an element adjustable upon an eccentric aXis carried by an adjacent wall and loactable with the hook-shaped latch mem- 2. A form for concrete and like structures comprising a-plurality of Walls hingedly connected together, a hook-shaped latch member pivotally carried by one of said Walls, and means coactable with said latch member and having al portion thereof arrangedito be adjusted eccentrically.

3. A'form for concrete and like structures comprising a plurality of Walls hingedly connected together, a hook-shaped latch member pivotally carried by one of said Walls, a stud carried by an adjacent Wall and extended laterally of the path of movement of said latch member, and a collar eccentrically adjustable on said stud and adapted to be engaged by the hooked portion of said latch member.

4. A form for concrete and like structures comprising an integral right angular member, Walls hingedly connected to the outer portions of said member and movable with relation thereto, a hook-shaped latch member pivotally carried by one of said hinged Walls, and an eccentrically adjustable element carried by the opposited hinged Walls and coactable with the latch member toretain said hinged Walls in closed position.

5. A form for concrete and like structures comprising a pair of Walls integrally formed at right-angle to each other, Walls co-acting with the edges of said integral Walls, and hinged devices connecting said last-named walls to said first-named Walls; said devices each consisting of a substantially L-shaped bracket projecting from an edge of its Wall and having its lateral member terminating in juxtaposition to the adjacent Wall and pivotally connected thereto, whereby an edge of said bracket is brought into contact With said adjacent Wall to position the Wall carrying said bracket in predetermined position relative to said adjacent Wall when the form is closed.

6.. A form-for concrete and like blocks roo comprising a plurality of Walls hingedly .onnectedtogether to pro vid e hollow structure when closed, a removable partition di-V viding the interior of the form into opposite chambers, and retractable means carrie-fl byv ture when closed, a. removable partition diriding the interior ,oi the form into opposite Vchambers and oinositelv arranged screws 7 .L e o tapped through Vsaid walls tosupport and position said partition; said screws adapted to be redraivn to flush with the interior face oit said Walls when said partition is not in USG. i

8. A form tor molding plastic material comprising a plurality ot panels, means for pivotally connecting` said panels comprising i ..shaped brackets integral with certainoi said'panels, pivots connecting said brackets to` adjacent panels, and projecting stops upon said adjacent panels; said stops co-4 operating With said pivots and brackets to control the relative positioning of the respective panels'.

9. A form for molding plastic material comprising a plurality ot Walls, means for pivotally connecting said Walls comprising .lh-shaped brackets integral with certain of said walls, pivots connecting said brackets to adjacent Walls, yprojecting stops upon said adjacent Walls and co-operating with said hinge elements to position the respective Walls, and latching devices carried by other adjacent Walls; said devicesprovided with shoulders arranged to abut the edges when s aid form Wall carried by said spaced Wall and adapted to engage the edgeso'l' adjacent Walls When Y the form is closed. j

il. i form 'for molding plastic material comprising a` pluralityT of walls Vhingedly connected together to provide a hollow structure when closed, one of said Walls being of less length than the remaining walls and spaced from the edges ot-.adjacent Walls when closed, means for retaining said Walls in closed position, and removable matrix wall carried by said Wall and Vadaptedto engage the edges o1 adjacent Walls when the term is closed.. Y v

l2. In combination with a form for molding plastic material, a shelf comprising'a substantially U-shapedstructure the horizontal connecting portion overhanging at its opposite ends the parallel members of said strncturc and provided with a central aperture, and slotted lateral flanges extended trom the lower ends of said parallel members.

Signed at Chicago, county of Cook, and State et Illinois, this 18th day of May, 1922.

' HARRY E. DUNN.

l/Vitnesses W. E. DUNN, V. F. SANDY. 

